Percolator.



PATENTED JAN. 7, 1908.

C. E. TREWHELLA.

PERCOLATOR.

APPLIGATION FILED APR.13, 190e.

2 SHEETS-SHEET 1.

Uff/Z555@ 5. fw A @di YM PATENTBD JAN. 7, 1908.

o. E. TREWHELLA.

PERGOLATOR.

APPLICATION FILED APR.13, 1906.

2 SHEETS-SHEET 2.

@Meewo. WASHINGTON, n. cA

UNITED STATES PATENT OFFICE.

CHARLES E. TREWHELLA, OF NEW BRITAIN7 CONNECTICUT, ASSIGNOR TO AMERICANSILVEL COMPANY, OF BRISTOL, CONNECTICUT, A CORPORATION.

PERCOLATOR.

Specification of Letters Patent.

Patented Jan` '7, 1908.

Application filed April 13.1906. Serial No. 3ll505.

To all 'whom 'it may concern.'

Be it known that LCI-IARLns E .TRnwnELLA, a citizen of the UnitedStates, residing at New Britain, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inPercolators, of which the following is a specification.

My invention relates to improvements in percolators, and the objects ofmy improvements are simplicity and economy in construction, withconvenience and efficiency in use, particularly with reference tosecuring the strainer in the glass cup and in securing the urn to itsstand.

In the accompanying drawing: Figure 1 is a front elevation of mypercolator. Fig. 2 is a reversed plan view of the bottom of the urn.Fig. 3 is an enlarged broken plan view of a part of the stand for theurn. Fig. 4 is a sectional view thereof, on the line x a: of Fig. 3.Fig. 5 is a sectional view of the same on the line y, y, of Fig. 3,together with a portion of the base fiange of the urn. Fig. 6 is asectional view of the lower portion of the urn and the ring of thestand, on the plane indicated by the line z e of Fig. 2, and with theparts unlocked ready to lift the urn ofll the stand. This figure is on asmaller scale than Figs. 3, 4, and 5, and on a larger scale than Figs. 1and 2. Fig. 7 is a detached side elevation of the strainer, and Fig. 8is a central verticalsection of the same together with the lower part ofthe glass cup to which it is fitted for forming the bottom of the saidcup.

A, designates the top rim or ring of the stand which is supported onlegs 9 in any ordinary manner, so that a lamp may be placed under thestand to heat the pot, vessel, or urn B, that may be placed thereon. Aglass cup C is placed on the top of the urn and is provided with adetachable strainer 1() which forms the bottom of the said cup forholding the coffee, tea or other material, as in ordinary percolators.This glass cup is provided with a reduced portion or base 11, that fitsinto the top of the pot or urn, while its larger part rests thereon, asshown in Fig. 1. At the junction of the base 11 and body of the lcup onthe inside there is a slightly contracted corner 12.

The strainer 10 is made of thin sheet'metal in the form of a shallow cupwith substantially vertical sides 13, perforated bottom 14, and anoutwardly turned flange 15 at its top edge. The said sides are providedwith slits 16 arranged in pairs at different points in itscircumference, preferably at six points, to form the metal between eachpair of slits into springs, the metal being bent or swaged outwardly alittle to make the middle portion 17 of each spring project slightlybeyond the rest of the sides 13 of the strainer, so that when thestrainer is crowded down into place within the bottom of the glass cup,the springs may yield a little to pass the corner 12 of the cup and thenspring outwardly to bear on the inner wall of the base 11 as shown inFig. 8, and hold the strainer snugly in place against accidentaldisplacement, but leaving it free to be forced out for removal. Thestrainer is provided with the usual central tube 18, to receive theupper end of the ordinary percolator tube, not shown, and may also beprovided with any ordinary spreader 19.

It is common in this class of percolators or analogous pots, to providea stand having a ring or rim for its top, for use with a lamp, and witha pot or urn removably fitted to the said ring or rim by means ofinterlocking devices on the urn and stand, and the same is herebydisclaimed.

My stand has its rim or ring A provided with an upwardly projectingannular bead 20 and inside of the said bead is an inwardly projectinghorizontal flange 21. Over this flange and spaced therefrom there arethree locking lugs 22, which are preferably formed integral with thesaid flange by being first cut out when in the plane of the said flangeas indicated by the broken contour lines in Fig. 3, and then doubled upas shown in Fig. 4. But instead of leaving them parallel with the saidflange 21 they are twisted slightly to make a wedging space between theconfronting faces of the lug and flange which space'is the greatest atthe entrance side, as best shown in Fig. 5, the said entrance side beingthe left hand side edge of thc said lug.

The bottom 23 of the pot or urn, may be of any ordinary construction.A't the bottoni of the pot or urn and rigid with the same, is anattaching flange or ring having sides Z4 that fit inside of the annularbead 2() on the stand ring A, and an in wardly turned flange 25 that isdesigned to rest on the top of the horizontal flange 21 of the saidstand ring A. This flange 25 is cut away or notched in three laces, asat 26, in Fig. 2, to admit the three ugs 22 of the stand. The metal atone side of these notches is turned up to form the stop lugs 27. Atpoints midway between the said notches, the flange 25 is provided withthree holding ribs 28 which are preferably formed .by swaging the metalof the flange 25, as best shown in Fig. 5.

In order to fasten the pot to the sta-nd it is only necessary to placethe pot thereon with the sides 24 of the attaching ring inside theannular bead 20 of the stand and rotate the pot thereon until the lugs22 pass through the notches in the flange 25 and the said lflange 25rests upon the horizontal flange 21 of the stand, as shown in Fig. 6.Then rotate the pot in the direction for turning in a right hand screwso as to bring the lugs 22 over the solid portions of the flange 25 withthe holding ribs 28 in the spaces between the ends of the said lugs andthe confronting horizontal flange 2l, and force the parts snugly intoplace. The lugs being set on the incline as shown in Fig. 5, will easilyadmit the holding ribs and then bind them tighter and tighter as theyare forced in, and at length stop the further turning of the pot withoutmore force than will ordinarily be applied, whereby the parts will stopin about the position shown in the said Fig. 5. rI`he pot and stand arethen rigidly secured together beyond any liability of being accidentallyunfastened. In order to detach the pot from the stand, turn it on thestand in the direction for unscrewing a right hand screw until the stoplugs 27 on the flange 25 engage the lugs 22 as shown in Fig. 6, when thelugs will register with the notches and the pot or vessel may be liftedfrom the stand.

By my improvement the strainer is readily put in and removed from Athebottom of the glass cup, and the top flange makes a close joint betweenthe cup and the strainer. The pot and the stand are very convenientlyand firmly secured together, and the stop lug on the pot prevents thepot from being turned so far on the stand, when detaching, as to carrythe holding lugs and notches beyond their registering position.

I claim as my invention l. ln a percolator, the combination of a glasscup having a reduced base portion with a detachable strainer in the formof a shallow cup with vertical sides and a top flange and springsprojecting from the said sides to engage the interior of the said base.

2. In a percolator, the combination of a glass cup having a reduced baseportion with a detachable strainer in the form of a shallow cup, withvertical sides, and integral springs projectinghoutwardly from the saidsides from between the slits in the metal thereof, substantially asdescribed.

3. In coffee pot or percolator, the combination of the vessel having onits bottom the inwardly turned horizontal Harige provided with notchesand holding ribs between the said notches, and the stand having anupwardly projecting annular bead and inwardly projecting horizontalflange provided with holding lugs for being engaged by the said flangeand ribs of the vessel, substantially as described.

4Min a coffee pot or percolator, the combination of the vessel havingonits bottom the inwardly turned horizontal flange provided with notchesand holding ribs, and the stand having a top ring provided with aninwardly projecting horizontal flange and holding lugs facing the flangeof the said stand which stand is provided with a wedging shaped spacebetween the said flange and lugs of the stand, and arranged to beengaged by the flange and ribs of the vessel substantially as described.

5. In a coffee pot or percolator, the combination .of a vessel having onits bottom a holding flange provided with notches, with a stand for thesaid vessel, the said stand having a top ring provided with lugs adaptedto be passed through the said notches and then into engagement with thesaid flange, and a stop lug on the said holding flange of the saidvessel, the said lug projecting from the said flange at one side of oneof the said notches.

6. In a cofl'ee pot or percolator, the combination of a vessel having onits bottom an inwardly turned flange, and a stand having an upwardlyprojecting annular bead, an inwardly projecting horizontal flange insideof said bead and holding lugs supported from the inner edge of the saidstand and extending outwardly above the same forming a space between the'said lugs and flange for the reception of the said inwardly turnedflange of the vessel.

7. In a coffee pot or percolator, the combination of a vessel and astand having interlocking flanges with suitable recesses and lugs fordetachably connecting the said pot from the said stand, and holding ribson one of the said flanges intermediate the said lugs for tightening upthe parts after the locking flangeshareh-first engaged with each other.

CHARLES E. TRE/VHELLA,

Witnesses:l

GUsTAF A. JOHNSON, JAMES A. MAGUIRE.

